APA
United Nations Economic and Social Affairs (Deptt of-), United Nations Economic and Social Affairs (Deptt of-), . (1962). Petroleum exploration. New York: United Nations USA.
Chicago
United Nations Economic and Social Affairs (Deptt of-), United Nations Economic and Social Affairs (Deptt of-), . 1962. Petroleum exploration. New York: United Nations USA.
Harvard
United Nations Economic and Social Affairs (Deptt of-), United Nations Economic and Social Affairs (Deptt of-), . (1962). Petroleum exploration. New York: United Nations USA.
MLA
United Nations Economic and Social Affairs (Deptt of-), United Nations Economic and Social Affairs (Deptt of-), . Petroleum exploration. New York: United Nations USA. 1962.
